<>

```ts
import fs from 'fs';
type OutputFileSystem = {
  writeFile: typeof fs.writeFile;
  mkdir: typeof fs.mkdir;
  readdir: typeof fs.readdir;
  rmdir: typeof fs.rmdir;
  unlink: typeof fs.unlink;
  stat: typeof fs.stat;
  lstat: typeof fs.lstat;
  readFile: typeof fs.readFile;
};
```

</>
